Reorganize root: move docs, remove tracked credentials and data files

- Move USER_GUIDE, planning docs, and session logs to docs/
- Untrack FedexAPI.txt (contains live API credentials) and OnPart_inv.csv (large data file)
- Update .gitignore to cover FedexAPI.txt and *_inv.csv going forward
- Delete junk files: =1.23.0, Address.txt, stale screenshot

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -9,3 +9,9 @@ dist/
 *.sqlite
 *.log
 *.exe
+
+# Credentials
+FedexAPI.txt
+
+# Large data files
+*_inv.csv

=1.23.0

@@ -1,9 +0,0 @@
-Defaulting to user installation because normal site-packages is not writeable
-Collecting pymupdf
-  Downloading pymupdf-1.27.2.3-cp310-abi3-win_amd64.whl.metadata (24 kB)
-Downloading pymupdf-1.27.2.3-cp310-abi3-win_amd64.whl (19.2 MB)
-   ---------------------------------------- 19.2/19.2 MB 33.8 MB/s  0:00:00
-Installing collected packages: pymupdf
-  WARNING: The script pymupdf.exe is installed in 'C:\Users\mario\AppData\Roaming\Python\Python314\Scripts' which is not on PATH.
-  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
-Successfully installed pymupdf-1.27.2.3

FedexAPI.txt

@@ -1,3 +0,0 @@
-Acc #: 740561073
-API: l7b887333c5360460fb7298cd07a81f30d
-Secret Key: 4bfc2a23dbba429ebd82d32681716cb3